Eight adults and one child died Friday in the accident that left twisted metal and debris strewn across the highway and stranded miles of traffic in scorching heat for hours.
Oklahoma Highway Patrol Lt. George Brown said an earlier crash had stopped eastbound traffic Friday afternoon on the Will Rogers Turnpike when the big rig slammed into at least three cars, which then crashed into more vehicles.
Brown described the scene as "like a war zone" with "debris, fluids, dead bodies."
Investigators don't believe the driver of the tractor-trailer tried to stop before the crash, Brown said. The speed limit in the area is 75 mph.
A criminal investigation is under way, as is routine after a fatal accident, and blood was drawn from the truck driver, Brown said. There was no indication alcohol was involved, he said.
Tow truck driver Bob Garner of Miami was one of the first respondents to the scene.
"This is the worst one I've ever worked," said Garner, who has been a tow truck driver for 30 years.
Jericho Malphrus, 17, was driving on the turnpike with his mother to his hometown of Orient, Ohio, after touring a Bible college in Broken Arrow.
"Mainly what struck me was the amount of debris everywhere," Malphrus said. "There were clothes and snacks and debris. Someone's suitcase had busted open and a little girl's clothes were everywhere."